Drywall patch backing stem



FIG. 1 is a top, perspective view for a drywall patch backing stemshowing my new design;

FIG. 2 is a right side view thereof, the left side, the front side andrear side view being the same image thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a sectional view taken along lines 5-5 from FIG. 2 thereof;

FIG. 6 is a sectional view taken along lines 6-6 from FIG. 2 thereof;and,

FIG. 7 is a sectional view taken along lines 7-7 from FIG. 2 thereof.

The broken lines in FIGS. 1, 2, and 5 show the a drywall patch backingstem to indicate that no particular length of the drywall patch backingstem forms a part of the claimed design.

The claimed design is broken in the center to indicate indefinitelength.

CLAIM The ornamental design for a drywall patch backing stem, as shownand described.